Welding helmet with integral user interface

ABSTRACT

A welding helmet is capable of providing an image representative of information from an associated welding operation where the image appears in the same focal range as the welding work area.

TECHNICAL FIELD

This invention relates in general to equipment used in welding.

BACKGROUND

Welding is an important process in the manufacture and construction ofvarious products and structures. Applications for welding are widespreadand used throughout the world, for example, the construction and repairof ships, buildings, bridges, vehicles, and pipe lines, to name a few.Welding may performed in a variety of locations, such as in a factorywith a fixed welding operation or on site with a portable welder.

In manual or semi-automated welding a user/operator (i.e. welder)directs welding equipment to make a weld. For example, in arc weldingthe welder may manually position a welding rod or welding wire andproduce a heat generating arc at a weld location. In this type ofwelding the spacing of the electrode from the weld location is relatedto the arc produced and to the achievement of optimum melting/fusing ofthe base and welding rod or wire metals. The quality of such a weld isoften directly dependent upon the skill of the welder.

Welders generally rely upon a variety of information when welding. Thisinformation includes, for example, current and voltage. Traditionally,welders would need to look at gauges on the control panel of the weldingequipment to gain this information. This would require the welder todirect their field of vision away from the welding work area and as suchwas undesirable.

In the past, efforts have been made to provide welders with informationduring welding, such as in the method disclosed in U.S. Pat. No.4,677,277, where current and voltage are monitored to produce an audioindication to the operator as to the condition of the arc in arcwelding. However, monitors consisting only of audio arc parameterindicators are hard to hear and interpolate and are not capable ofachieving the desired closeness of control and quality of weld oftenrequired.

More recently, as disclosed in U.S. Pat. No. 6,242,711, an apparatus formonitoring arc welding has been developed that provides a welder withreal-time voltage and current conditions of the welding arc whereinformation in the form of lights, illuminated bar graphs, lightprojections, illuminated see-through displays, or the like are placedwithin the visual range of the helmet wearing operator and located inproximity to the helmet viewing window in the helmet. However, in thisapparatus a welder must still move their visual focus away from thewelding work area in order to focus on the information located proximateto the welding window or the welder must accept the informationperipherally while continuing to focus on the welding work area.

SUMMARY

This invention relates to a welding helmet that is capable of providingan image representative of information from an associated weldingoperation where the image appears in the same focal range as the weldingwork area.

Various aspects will become apparent to those skilled in the art fromthe following detailed description and the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of a welding system according to the presentinvention.

FIG. 2 is an enlarged view of a welding helmet similar to the helmet ofFIG. 1 including a camera.

FIG. 3 is a cross-sectional diagram of a welding helmet similar to thehelmet of FIG. 2 including a projector.

FIG. 4 is a cross-sectional diagram of a welding helmet similar to thehelmet of FIG. 3 including an integrated video display.

FIG. 5 is a perspective view of a welding helmet similar to the helmetof FIG. 2 including binocular cameras.

FIG. 6 is an interior view of a welding helmet similar to the helmet ofFIG. 5 showing binocular viewing screens.

DETAILED DESCRIPTION

Referring now to the drawings, there is illustrated in FIG. 1 a weldingsystem 10. The welding system 10 includes a welding helmet 12, a weldingsystem 14, a welding gun 16 and a work piece 18. The work piece 18generally defines a welding work are 20 where the welding gun 16 may beused to form a weld.

The welding system 14 includes welding equipment for generating awelding current and voltage, a welding control system for controllingthe welding current and voltage, and a monitoring system for monitoringthe welding current and voltage. The monitoring system may also monitora variety of other operating parameter, such as but not limited to, wirefeed speed, amount of wire used/amount of wire remaining, any type ofwelding feedback desired by the operator and any other desired operatingparameter.

The welding helmet 12 includes a main body 22 with a visual display 24connected to the main body 22. The display 24 may be a window includinga welding lens, a video monitor, such as an LCD display or LED array, orany other device suitable to allow a welder to see the welding work area20. It must be understood that in such an example where the display 24is a video monitor video processing may be utilized to enhance thepictures of the welding operation. Further, recording devices mayoptionally be included to record and later playback welding operationsfor analysis and/or evaluation.

As best shown in FIG. 2, a welding helmet 12 may include a camera 26mounted at or proximate to the point of view of the welder. In theexample where the visual display 24 is a video monitor, the camera 26may provide video pictures of the welding work area 20 to the display24.

As shown in FIGS. 3 and 4 an information generating mechanism 28 is incommunication with the monitoring system of the welding system 14 andcapable of generating an image representative of information from themonitoring system based upon the a monitored welding parameter, such ascurrent and voltage upon the visual display 24 where the focus of theimage is at a focus range with an associated welding work area, e.g.outside of the main body 22 of the welding helmet 12. For example, theimage may be symbolic, alpha-numeric, or any other device suitable toindicate the information. Thus, a welder may view an imagerepresentative of information about a welding operation without removingfocus from the work area. Thus, in at least one embodiment the weldermay focus on the work area and the image of information at the sametime.

It must be understood that among other types of information, along witha variety of other parameter, the information based upon welding currentand voltage includes, but is not limited to, welding current feedback,welding voltage feedback, control settings of the welding equipment,statistical information of the welding process, benchmarks or limitsincluding capacity representations, alerts including material shortageor low flow, a representation of an intended or desired weld, etc.

Further, in one embodiment, the camera 26 is used to calibrate the depthof the image relative to the welding work area 20. In anotherembodiment, positions sensors on the welding gun may be used tocalibrate the depth of the image. In particular applications it ishighly desirable to carefully align the image and the welding work aresuch that the information represented in the image is easy for thewelder to access and such that the information in the image is readilyaccepted by the welder.

In the example where the visual display 24 is a video monitor,information generating mechanism 28 may include an image representativeof information from the monitoring system based upon the monitoredparameter, such as welding current and voltage, in video pictures of thewelding work area 20 shown on the display 24.

As indicated at 29, the information generating mechanism 28 may be inwired or wireless communication with other devices as desired.

In FIG. 3, the information generating mechanism 28 is a projector 28.The projector may, for example, include an internal LCD display or LEDarray 30 along with a number of associated mirrors 32 to reflect theimage generated to the visual display 24. The reflected image gives theimage the appearance of depth relative to the visual display 24 and thusputs the image at a focus range with an associated welding work area andoutside of the main body 22 of the welding helmet 12 and optionally atthe same focal distance as the associated welding work area 20.Optionally, a reflective surface 34 may be placed upon a portion of thevisual display 24 in order to achieve a desired amount of reflection orreflection angle. In one embodiment, teleprompter type technology may beutilized to place the image upon the display 24 or surface 34.Additionally, it must be understood that one embodiment includes the useof an LCD display or other similar display within the helmet to generatethe image which is then sent along an optical path, such as byreflection or fiber optics or any other suitable device to place theimage display 24 or surface 34.

In FIG. 4, the information generating mechanism 28 includes a screen,film, or sheet 36 integrated into the visual display 24. The sheet 36may be a semi-transparent LCD film, electro-optic film, or any othersuitable medium for the information generating mechanism 28 to producean image generated in the visual display 24. In one application, theinformation generating mechanism 28 may projecting a stereogram on thewelding lens such that a welder's eyes will separately view the imagesto create the perception of depth and thus focus the image at a focusrange with the associated welding work area 20 and outside of the mainbody 22 of the welding helmet 12.

There is shown in FIG. 5 a welding helmet 12 including binocular cameras26 a and 26 b. As shown in FIG. 6, these cameras 26 a and 26 bcorrespond to binocular viewing screens 24 a and 24 b. An informationgenerating mechanism may produce an image to be generated in either ofthe viewing screens 24 a or 24 b or both. In one embodiment, the cameras26 a and 26 b are placed in alignment with the screens 24 a and 24 bexcept on opposite sides of the main body 22, thus giving the welder theview directly in front of them. Additionally, in the embodiment withbinocular cameras 26 a and 26 b and binocular viewing screens 24 a and24 b the perception of depth of filed is produced.

In any case, the image may be an overlay of text or graphics or videofeedback. Additionally, it is contemplated that in at least oneembodiment the system described above may be used in a remote weldingsituation, including but not limited to robotic welding or underwaterwelding.

While principles and modes of operation have been explained andillustrated with regard to particular embodiments, it must beunderstood, however, that this may be practiced otherwise than asspecifically explained and illustrated without departing from its spiritor scope.

What is claimed is:
 1. A welding system comprising: welding equipmentfor generating a welding current and voltage a welding control systemfor controlling the welding current and voltage a monitoring system formonitoring a welding parameter, and a welding helmet including: a mainbody a visual display connected to the main body, and an informationgenerating mechanism in communication with the monitoring system capableof generating an image representative of information from the monitoringsystem based upon the monitored welding parameter upon the visualdisplay where the focus of the image is outside of the main body.
 2. Thewelding system of claim 1 where the visual display is a window includinga welding lens.
 3. The welding system of claim 2 where the informationgenerating mechanism is capable of projecting a stereogram on thewelding lens.
 4. The welding system of claim 2 where the informationgenerating mechanism includes a series of minors for reflecting theimage toward the welding lens.
 5. The welding system of claim 2 wherethe welding helmet includes a reflective surface proximate the weldinglens for reflecting the image toward the interior of the welding helmet6. The welding system of claim 1 where the information generatingmechanism includes an LCD display.
 7. The welding system of claim 1where the information generating mechanism includes an LED array.
 8. Awelding system comprising: welding equipment for generating a weldingcurrent and voltage a welding control system for controlling the weldingcurrent and voltage a monitoring system for monitoring a weldingparameter, and a welding helmet including: a main body a visual displayconnected to the main body, and an information generating mechanism incommunication with the monitoring system capable of generating an imagerepresentative of information from the monitoring system based upon themonitored welding parameter upon the visual display where the focus ofthe image is in a focus range with an associated welding work area. 9.The welding system of claim 8 where the visual display includes at leastone video monitor for displaying a picture of the associated weldingwork area.
 10. The welding system of claim 9 where the welding helmetfurther includes at least one camera connected to the main body forproviding the picture.
 11. The welding system of claim 9 where theinformation generating mechanism is capable of including the image inthe picture.
 12. The welding system of claim 9 where the video monitorincludes an LCD display.
 13. The welding system of claim 8 where theimage includes alpha-numeric characters.
 14. The welding system of claim8 where the focus of the image is at the same focal distance as theassociated welding work area.
 15. A welding assembly comprising: weldingequipment for generating a weld, and a welding helmet including: a mainbody a visual display connected to the main body for displaying welding,and an information generating mechanism in communication with thewelding equipment capable of generating an image representative ofinformation from the welding equipment based upon the welding upon thevisual display where the focus of the image is in a focus range with anassociated welding work area.
 16. The welding system of claim 15 wherethe visual display includes at least one video monitor for displaying apicture of the associated welding work area.
 17. The welding system ofclaim 16 where the information generating mechanism is capable ofincluding the image in the picture.
 18. The welding system of claim 16where the video monitor includes an LCD display.
 19. The welding systemof claim 15 where the image includes alpha-numeric characters.
 20. Thewelding system of claim 15 where the focus of the image is at the samefocal distance as the associated welding work area.